I have a question you guys...

So for the past two days I’ve been having brownish/pinkish discharge. It started after I tried having a BM. It started off as pinkish discharge when I wipe and now it’s just happening out of nowhere for no reason.. keep in mind I’ve had two miscarriages but none of them were ever like this.. I went to the ER yesterday due to my on call nurse at the clinic I go to, telling me I should go. After the whole visit, I got to have an ultrasound and it looks like the baby is 5w 4d and my hcg level is at 16,482. The doctor said it doesn’t look like I’m having a ectopic pregnancy and maybe I’m going through a miscarriage but there was no way for them to tell because everything was looking good... I don’t know if this is a start to a miscarriage or old blood or something?? It’s confusing. This whole pregnancy has been confusing really, I tested positive 9 days before my missed period.. if anyone could share their experiences with this and let me know if it’s normal or not, that would be very helpful because doctors had no answer for me. If I can’t figure out why, I’m gonna call my midwife and see what she could do. BTW I’m on progesterone although my progesterone levels aren’t low and I have been having period like cramps but they come and go, nothing abnormal.